In the last couple of days I tried Avast 4.8 and AVG 7.5. As far as I know, the AVG is only antivirus, but the Avast has antivirus, anti-spyware, and anti-rootkit also. I tried both on my AMD Athlon 64 X2 dualcore 6400+ Black edition system with 2gb PC6400 DDR2 RAM, and it seems like my computer actually runs a little faster with the Avast compared to the AVG. Could this be right? Doesn't the Avast have more processes going on though? I currently have 5 out of 7 processes running on Avast (I didn't need all 7).